implement eigX and Xdet (#207)

Project.toml

@@ -1,7 +1,7 @@
 name = "NamedDims"
 uuid = "356022a1-0364-5f58-8944-0da4b18d706f"
 authors = ["Invenia Technical Computing Corporation"]
-version = "1.0.0"
+version = "1.1.0"
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"

src/functions_linearalgebra.jl

@@ -174,4 +174,7 @@ end
 # Diagonal on a nameddim presently loses its nameddimsness. So just pass through for now.
 LinearAlgebra.:\(A::Diagonal, B::NamedDimsArray) = LinearAlgebra.:\(A, parent(B))
 
-LinearAlgebra.isposdef(A::NamedDimsArray) = isposdef(parent(A))
+# eigenvectors and eigenvalues do not inherit dimension names
+for f in [:isposdef, :eigen, :eigvals, :det, :logdet, :logabsdet]
+    @eval LinearAlgebra.$f(A::NamedDimsArray) = $f(parent(A))
+end

test/functions_linearalgebra.jl

@@ -200,6 +200,17 @@ end
     )
 end
 
+@testset "LinearAlgebra: eigen, det" begin
+    A = rand(4, 4)
+    corr = A * A'
+    nda = NamedDimsArray{(:a, :b)}(corr)
+    @test eigen(nda) == eigen(corr)
+    @test eigvals(nda) == eigvals(corr)
+    @test det(nda) == det(corr)
+    @test logdet(nda) == logdet(corr)
+    @test logabsdet(nda) == logabsdet(corr)
+end
+
 @testset "isposdef" begin
     A = [1 2; 2 50]